w=37
2w+w+69= 180 knowing that all triangles add up to 180 form an equation
3w+69=180 combine like terms and subtract 69 from both sides
3w=111 divide by 3 from both sides
w=37
 
        
                    
             
        
        
        
2: (360-50-50)/2=130 degrees
        
             
        
        
        
Step-by-step explanation:
We have (x + y)² = (x + y)(x + y) = x² + 2xy + y².
Let x be 3a and y be 2.5b.
Therefore (3a + 2.5b)² 
= (3a)² + 2(3a)(2.5b) + (2.5b)²
= 9a² + 15ab + 6.25b².
Hence the '*' sign should be replaced with 15ab.
 
        
             
        
        
        
Answer:
Step-by-step explanation:
1. 8.2 * 6.7 / 0.46
2. 54.94 / 0.46
3. 119.434783
4: 120